645113706700 has 36 divisors (see below), whose sum is σ = 1482243614712. Its totient is φ = 242866336000.

The previous prime is 645113706689. The next prime is 645113706703. The reversal of 645113706700 is 7607311546.

It is not an unprimeable number, because it can be changed into a prime (645113706703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189737626 + ... + 189741025.

It is an arithmetic number, because the mean of its divisors is an integer number (41173433742).

Almost surely, 2^645113706700 is an apocalyptic number.

It is an amenable number.

645113706700 is an abundant number, since it is smaller than the sum of its proper divisors (837129908012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645113706700 is a wasteful number, since it uses less digits than its factorization.

645113706700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379478682 (or 379478675 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 645113706700 in words is "six hundred forty-five billion, one hundred thirteen million, seven hundred six thousand, seven hundred".